Scheme 9
Scheme 10
Scheme 11
Scheme 12
- If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in "How to troubleshoot". (Refer to «HOW TO TROUBLESHOOT»(ref-619155-S21491093182014053000000) )
- Caution in handling of SRS airbag system (Refer to «SRS AIRBAG SYSTEM»(ref-619160-S11196911262014053000000) ) CAUTION: This service operation may affect the SRS airbag. Be sure to follow the precautions for SRS airbag during the operation.
- Caution during harness repair When repairing the wire, connect the wires using soldering and protect it with tape. CAUTION: Bus lines (communication lines) must be twisted. Be careful not to make clearance between CAN-H and CAN-L. Fray at the connector should be within 8 cm. Do not change the line length. (CAN-H and CAN-L must have the same length). Do not connect a wire to bypass the defective section. CAUTION: If bypassed, the twisted lines will lose their properties. Do not bypass using the twisted pair line.
- How to measure resistance When measuring the resistance, insert the probes from the back side of the connector. If it cannot be inserted from the back side, use a repair wiring harness.
Scheme 13
Scheme 13: Parts Location
Scheme 14
Scheme 15
Scheme 15: System Description
- Summary CAN (Controller Area Network) is a serial communication network for real time applications. It is an on-vehicle multiplex communication line with high data transmission and error detection function. CAN communication uses differential voltage signals from a pair of lines: CAN-H and CAN-L (a base voltage is applied to generate potential difference for communication). Many ECMs (sensors) are equipped onto a vehicle and each of them shares information and links with other ECMs (sensors) via CAN communication. The main line has two resistors that are necessary for CAN communication.
- Definitions of terms Main line Harness between the two termination circuits on the bus (communication line). Sub-line A line branching from the CAN bus main line to an ECM or sensor. Termination circuit A circuit, composed of resistor and capacitor, converts the line current to bus voltage. Two termination circuits - one at each end of the main bus line are required. CAN J/C J/C for CAN communication.
- Circuit description The circuit is configured based on VBUS. (For circuit connection, refer to «CIRCUIT FIGURE»(ref-619155-S05702276312014053000000) ) Each termination circuit on CAN bus has a 120 ohmsresistor.
Description of functions
| Diagnostic items | Symptoms | Possible cause |
|---|
| Sub-lines 57-63 ohms(DTC detected on the transmission control computer assembly system) | Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. | Transmission control computer assembly, open circuit in sub-line or connector defect Transmission control computer assembly, power supply system defect Transmission control computer assembly, internal error |
Scheme 16
Scheme 16: Circuit figure
| Diagnostic items | Symptoms | Possible cause |
|---|
| Sub-lines 57-63 ohms(DTC detected on VDC system) | Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. | Brake actuator assembly, open circuit in sub-line or connector defect Brake actuator assembly, power supply system defect Brake actuator assembly, internal error |
Scheme 17
Scheme 17: Circuit figure
| Diagnostic items | Symptoms | Possible cause |
|---|
| Sub-lines 57-63 ohms(DTC detected on the spiral cable sub-assembly system) | Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. | Spiral cable sub-assembly (with sensor), open circuit in sub-line or connector defect Spiral cable sub-assembly (with sensor), power supply system defect Spiral cable sub-assembly (with sensor), internal error |
Scheme 18
Scheme 18: Circuit figure
| Diagnostic items | Symptoms | Possible cause |
|---|
| Sub-lines 57-63 ohms(DTC detected on ECM system) | Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. | Engine control computer, open circuit in the main line or connector defect Engine control computer, power supply system defect Engine control computer, internal error |
Scheme 19
Scheme 19: Circuit figure
| Diagnostic items | Symptoms | Possible cause |
|---|
| Sub-lines 57-63 ohms(DTC detected on the airbag system) | Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. | Airbag sensor assembly, open circuit in the sub-line or connector defect Airbag sensor assembly, power supply system defect Airbag sensor assembly, internal error |
Scheme 20
Scheme 20: Circuit figure
| Diagnostic items | Symptoms | Possible cause |
|---|
| Sub-lines 57-63 ohms(DTC detected on the electric power steering system) | Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. | Power steering computer assembly, open circuit in the sub-line or connector defect Power steering computer assembly, power supply system defect Power steering computer assembly, internal error |
Scheme 21
Scheme 21: Circuit figure
| Diagnostic items | Symptoms | Possible cause |
|---|
| Sub-lines 57-63 ohms(DTC detected on the air conditioner control panel system) | Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. | Air conditioner amplifier assembly, open circuit in the sub-line or connector defect Air conditioner amplifier assembly, power supply system defect Air conditioner amplifier assembly, internal error |
Scheme 22
Scheme 22: Circuit figure
| Diagnostic items | Symptoms | Possible cause |
|---|
| Sub-lines 57-63 ohms(DTC detected on the combination meter assembly system) | Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. | Combination meter assembly, open circuit in the sub-line or connector defect Combination meter assembly, power supply system defect Combination meter assembly, internal error |
Scheme 23
Scheme 23: Circuit figure
| Diagnostic items | Symptoms | Possible cause |
|---|
| Sub-lines 57-63 ohms(DTC detected on the combination meter assembly system) | Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. | Collation ECM (Smart key computer assembly), open circuit in sub-line or connector defect Collation ECM (smart key computer assembly), power supply system defect Collation ECM (smart key computer assembly), internal error |
Scheme 24
Scheme 24: Circuit figure
| Diagnostic items | Symptoms | Inspection items |
|---|
| Sub-lines 57-63 ohms(DTC detected on the body integrated unit system) | Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. | Main body ECM (Multiplex network body computer), open circuit in sub-line or connector defect Main body ECM (multiplex network body computer), power supply system defect Main body ECM (multiplex network body computer), internal error |
Scheme 25
Scheme 25: Circuit figure
If the resistance between the data link connector 6 (CANH) and 14(CANL) is 63 ohmsor more, CAN bus main line or the sub-line to the data link connector may be open.
| Symptoms | Possible cause |
|---|
| Resistance between the data link connectors 6 (CANH)<-->14 (CANL) is 64 ohmsor more | Open circuit in the sub-line or defective connector in the data link connector Open circuit in CAN bus main line or connector defect Wiring harness connector (CAN J/C1) Wiring harness connector (CAN J/C2) Engine control computer, internal error Brake actuator assembly, internal error |
This malfunction is not caused by CAN bus sub-line or each ECM and sensor connected to CAN bus sub-line.
Scheme 26
Scheme 26: Circuit figure
If the resistance between the data link connector 6 (CANH) and 14(CANL) is less than 57 ohms, there may be a line-to-line short in CAN bus.
| Symptoms | Possible cause |
|---|
| Resistance between the data link connectors 6 (CANH)<-->14 (CANL) is less than 57 ohms | Short between CAN bus main lines Short between CAN bus sub-lines Main body ECM (Multiplex network body computer) Combination meter assembly Collation ECM (Smart key computer assembly) (1) Engine control computer Transmission control computer assembly (2) Brake actuator assembly Spiral cable sub-assembly (with sensor) Power steering computer assembly Air conditioner amplifier assembly (3) Airbag sensor assembly PSP (Accessory bus buffer) Wiring harness connector (CAN J/C1) Wiring harness connector (CAN J/C2) |
| (1) With smart entry (2) Transmission A/T (3) For automatic air conditioning system |
| (3) | For automatic air conditioning system |
Scheme 27
Scheme 27: Circuit figure
Scheme 28
Main line or sub-line may be shorted to battery circuit or shorted to battery circuit within one of the control modules.
| Symptoms | Possible cause |
|---|
| The voltage between the data link connector 6 (CANH), 14 (CANL) <-->chassis ground is 5 V or more | CAN bus main line short to +B CAN bus sub-line short to +B Main body ECM (Multiplex network body computer) Combination meter assembly Collation ECM (Smart key computer assembly) (1) Engine control computer Transmission control computer assembly (2) Brake actuator assembly Spiral cable sub-assembly (with sensor) Power steering computer assembly Air conditioner amplifier assembly (3) Airbag sensor assembly PSP (Accessory bus buffer) Wiring harness connector (CAN J/C1) Wiring harness connector (CAN J/C2) |
| (1) With smart entry (2) Transmission A/T (3) For automatic air conditioning system |
| (3) | For automatic air conditioning system |
Main line or sub-lines may be shorted to ground or shorted to ground within one of the control modules.
| Symptoms | Possible cause |
|---|
| Resistance between the data link connector 6 (CANH), 14 (CANL) <-->chassis ground is 10 ohmsor less | CAN bus main line short to GND CAN bus sub-line short to GND Main body ECM (Multiplex network body computer) Combination meter assembly Collation ECM (Smart key computer assembly) (1) Engine control computer Transmission control computer assembly (2) Brake actuator assembly Spiral cable sub-assembly (with sensor) Power steering computer assembly Air conditioner amplifier assembly (3) Airbag sensor assembly PSP (Accessory bus buffer) Wiring harness connector (CAN J/C1) Wiring harness connector (CAN J/C2) |
| (1) With smart entry (2) Transmission A/T (3) For automatic air conditioning system |
| (3) | For automatic air conditioning system |
